JPS62116061A - Scanner printer - Google Patents

Abstract

PURPOSE:To drive an original conveying mechanism and a cutter with the same motor and to execute a total double communication in a facsimile device by driving an original conveying mechanism and a cutter mechanism to cut the recording paper with the common motor to rotate in one direction. CONSTITUTION:In the condition of transmission, a motor 7 is rotated in an alphadirection, an original conveying roller 1 is rotated, an original 4 is conveyed through the reading part and reading is successively read by the reading part. In the transmitting and receiving condition, while the motor 7 is rotated and the original is sent by the original conveying roller, the reading is executed and simultaneously, the receiving to the recording paper is executed. At such a time, when the prescribed receiving is completed, a solenoid 19 is operated, a cutter mechanism 11 is operated and the cutting of the recording paper is executed. When a highly speedy data transmission line is used, the rotating speed of the motor 7 during the reading action also comes to be highly speedy and the rotating time of a cutter rotating blade 11a can be also shortened, and therefore, even when the cutter mechanism is operated during the reading, any trouble will not occur and consequently, the total double communication can be executed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a scanner printer that has an original reading section and a recording section in the same device, such as a facsimile machine having a copying function.

2. Description of the Related Art Generally, a scanner printer uses three motors: a motor for conveying a document, a motor for conveying a recording paper, and a cutter drive motor for cutting the recording paper. However, since it is uneconomical to use three motors, proposals have been made to share the motors. As an example, there is known an apparatus shown in FIG. 3 in which a single motor is used to transport the document and drive the cutter.

To explain this simply, in FIG. 3, 31 is a document transport roller that transports the document through the reading section, 32 is a recording paper, 33a is a rotary cutter blade, 33b is a fixed cutter blade, and the shaft of the document transport roller 31 is A pulley 35 is attached to the shaft via a one-way clutch 34, and a one-way clutch 36 is attached to the shaft of the cutter rotary blade 33a.
Pulleys 37 are attached via these pulleys 35
．． 37 has a structure in which it is driven by a common motor 39 via a belt 38. The motor 39 used here is a reversible motor. A one-way clutch 34 attached to the document conveyance roller 31 transmits the rotation of the pulley 35 to the shaft when it rotates in the α direction, but causes the pulley to idle when it rotates in the β direction. The one-way clutch 36 attached to the cutter rotary blade 33a acts in the opposite direction, transmitting the rotation of the pulley 37 in the β direction to the cutter rotary blade, and causing the pulley to idle in the α direction. In this manner, in the apparatus shown in FIG. 3, when the motor 39 rotates in one direction, for example, in the direction of rotating the pulleys 35 and 37 in the α direction, the document conveyance roller 31 is driven, while the cutter rotary blade 33a is stopped. When the motor 39 rotates in the opposite direction, the document conveyance roller 31 stops and the cutter rotary blade 33a is driven.

Problems to be Solved by the Invention However, the structure that includes the one-way clutch in the drive system as described above has the problem of causing uneven document feeding in the reading section in devices that operate intermittently, such as facsimile machines. It had In other words, with a one-way clutch, there is always a delay in clutch operation at startup,
This caused uneven feeding of the manuscript. Furthermore, in the conventional structure described above, the document transport roller and cutter cannot be operated at the same time, so there is a problem that full-duplex communication of transmitting and receiving is not possible.

The present invention has been made in view of the above-mentioned problems, and does not use a clutch mechanism that causes uneven feeding in the document conveyance means that conveys the document through the reading section, and moreover, the document conveyance mechanism uses the same motor. It is an object of the present invention to provide a scanner printer that can drive a scanner and a cutter, and also enables full-duplex communication when applied to a facsimile machine.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a paper feeding means for taking out the original to be read placed in the paper feeding section, and a conveying means for transporting the original to be read through the reading section. A common motor that rotates in one direction drives the document conveyance mechanism and the cutter mechanism that cuts the recording paper, and a clutch mechanism is interposed between the cutter mechanism and the motor. The cutter mechanism is connected to the motor and driven only in certain cases.

By the way, it has been found that with a configuration in which the document transport mechanism and the cutter mechanism are simply driven by rotation of the motor in one direction, a new problem arises when copying a plurality of documents. That is, in a copying operation, a single document is read and its contents are simultaneously recorded on a recording paper inside the device, and when the reading and recording of the document is completed, the cutter mechanism is activated to cut the recording paper. Since the document conveying mechanism is driven by a motor even when the mechanism is in operation, a problem arises in that the leading edge of the next document passes through the reading position, making it impossible to record that portion.

In order to solve this problem, in the present invention, when a plurality of originals are fed one after another, a means is provided to create a distance between the originals by a distance greater than the original transport distance caused by the rotation of the motor for operating the cutter mechanism. It also has a structure.

According to the above-described configuration, the present invention eliminates the need for a clutch such as a one-way clutch in at least the conveyance means for conveying the document through the reading section in the document conveyance mechanism, and eliminates uneven feeding caused by the clutch mechanism. I can do it.

Also, when copying multiple originals, the distance between the originals is greater than the distance that the originals are transported while the cutter mechanism is operating, so the cutter mechanism must be operated after the originals have been scanned. However, the leading edge of the next document does not pass the reading position, and it is possible to copy multiple documents without any problems.

Furthermore, since document conveyance and cutter operation can be performed simultaneously, full-duplex communication is also possible when the apparatus of the present invention is used as a facsimile machine.

Embodiments Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view schematically showing a drive system of a facsimile machine according to an embodiment of the present invention, and FIG. 2 is a diagram illustrating paper feeding timing during a copying operation in the facsimile machine. In FIGS. 1 and 2, 1 is a document transport roller;
Reference numeral 2 denotes a document reading section, and reference numeral 3 denotes a pinch roller that is pressed against the document transport roller 1. The document conveying roller 1 and the pinch roller 3 constitute a conveying means for conveying the document 4 through the reading section 2. A pulley 6 is attached to the shaft of the document conveyance roller 1, and the pulley 6 is connected by a belt 9 to a pulley 8 held by a drive shaft of a motor 7. The motor 7 is a motor that rotates in one direction (α direction), and the document conveying roller 1 is always driven to rotate in the α direction while the motor 7 is rotating.

10 is a recording paper; 11 is a cutter mechanism that cuts the recording paper 10 at a predetermined position. The cutter mechanism 11 is a cutter rotating blade 1
1a, a cutter fixed blade 11b, and a cutter rotating blade 11.
A gear 13 and a spring clutch mechanism 14 are provided on the shaft 12 of a. The gear 13 is rotatably provided with respect to the shaft 12 and meshes with a gear 16 that rotates together with a pulley 15 that is driven by a belt 9 that is driven by a motor 7. Therefore, the gear 13 rotates in the β direction due to the rotation of the motor 7 in the α direction. The spring clutch mechanism 14 selectively transmits the rotation of the gear 13 to the shaft 12. In order to control the spring clutch mechanism 14, a swingable pawl 17, which is normally connected to the spring clutch mechanism 14, is provided. A spring 18 is provided which urges a built-in power transmission spring (not shown) to a position where it engages, and a solenoid 19 which moves the pawl 17 upward to disengage it from the spring. .

When the claw 17 is lifted by the solenoid 19, the rotation of the gear 13 is transmitted to the cutter rotary blade 11a, and the cutter rotary blade 11a rotates in the β direction to cut the recording paper. Note that the clutch mechanism for selectively transmitting the rotation of the motor 7 to the cutter rotary blade 11a is not limited to the illustrated spring clutch mechanism, and other types of clutches may be used.

In FIG. 2, upstream of the document transport roller 1, a paper feed section 21 that accommodates a large number of documents 4 and a paper feed means, ie, a paper feed roller 22, that take out the documents one by one are provided. The paper feed roller 22 is drivingly connected to the shaft of the document transport roller 1 via a suitable latch (not shown), and is driven by the motor 7 together with the document transport roller 1 when the clutch is activated. This paper feeding means 22 and conveyance means such as the document conveyance roller 1 and the pinch roller 3 constitute a document conveyance mechanism. The document reading section 2 is provided with a sensor 24 for detecting the end of the document, a fluorescent lamp 25 for illuminating the document 4, a lens 26 for focusing reflected light from the document, an image sensor 27, and the like.

The clutch provided on the paper feed roller 22 is provided with a control circuit that controls its activation timing. This operation timing is set such that the interval between documents supplied to the reading section during copying operation is adjusted so that the document conveyance mechanism (paper feed roller 22 and document conveyance roller 1) rotates between the rotations of the motor for one cutter operation. The distance for transporting the document is determined to be greater than the distance specified above. For example, as shown in FIG. 2, when the paper feed roller 22 and the document reading position are separated by the document transport distance t during one cutter operation, the paper feed roller 22 is The timing at which the clutch is activated is determined to occur at or after the end of the document after reading has passed the reading position. If the distance between the paper feed roller 22 and the reading position is shorter than the document transport distance t, the operation timing is delayed accordingly. Conversely, if the interval is long, the activation timing can be advanced. In this way, the control circuit that controls the actuation timing of the clutch provided on the paper feed roller 22 adjusts the interval between the documents fed to the reading section during the copying operation during the rotation of the motor for one cutter operation. In addition, means for increasing the distance over which the original is transported by the original transport mechanism is configured.

Next, the operation of the facsimile machine having the above configuration will be explained. A facsimile machine has three operating states: sending, receiving, and copying, and each will be explained below.

In the transmission state, the motor 7 rotates in the α direction, the document conveyance roller 1 rotates, and the document 4 is conveyed through the reading section, where it is sequentially read. At this time, the gear 13 on the shaft 12 of the cutter rotary blade 11a is rotating in the β direction,
Since the pawl 17 engages with the built-in spring of the spring clutch mechanism 14 and does not transmit power, only the gear 13 rotates idly and the cutter rotary blade 11a is stopped.

In the receiving state, the recorded recording paper 10 is cut by the cutter mechanism 11.
When the cutter is operated, the motor 7 rotates in the α direction, the claw 17 is raised by the solenoid 19, and the spring clutch mechanism 14 is activated to transmit the rotation of the gear 13 to the cutter rotary blade 11a, causing the cutter to rotate. The blade 11a rotates.

At this time, as the motor 7 rotates for the cutter operation, the document transport roller 1 also rotates, but since the receiving operation is in progress, the document cannot be processed.

Even if the conveyance roller rotates, there is no problem with the device.

In the transmitting/receiving state, the motor 7 rotates and the document is read while being fed by the document conveyance roller, and at the same time, the document is received onto the recording paper. At this time, when the predetermined reception is completed, the solenoid 19 is activated to operate the cutter mechanism 11 to cut the recording paper. When a high-speed data transmission path is used, the rotational speed of the motor 7 during reading operation also becomes high.
Since the rotation time of the cutter rotary blade 11a can also be shortened, there is no problem even if the cutter mechanism is operated during reading, and full-duplex communication is therefore possible.

In the copying state, the motor 7 rotates in the α direction as shown in FIG.
The contents are conveyed through the reading section 2 and the contents are transferred to the image sensor 27.
and simultaneously recorded on the recording paper 10. In addition,
The clutch of the paper feed roller 22 is deactivated at an appropriate time after the document 4 from the paper feed section 21 is sent to the document transport roller 1, and the paper feed roller 22 is not forcibly driven. When the end of the document being read passes the sensor 24 and is then fed a specified amount, the end of the document reaches the reading position and the reading of one document is completed.At the same time, the cutter mechanism is activated to cut the recording paper 10. 11 is activated. The operation of the cutter mechanism 11 is performed by counting an appropriate time from the detection signal of the end of the document by the sensor 24. While the cutter mechanism 11 is in operation, the motor 7 is naturally rotating, so the original 4 after being read is
is sent out by the document transport roller 1. On the other hand, after the end of the document passes the sensor 24, the clutch of the paper feed roller 22 is activated at an appropriate timing, and a new document from the paper feed section 21 is sent out by the paper feed roller 22. This paper feed roller 2
2 is driven even when the motor rotates seven times to operate the cutter mechanism 11 when the clutch is in operation, so a new document from the paper feed section is sent toward the reading section 2 while the cutter is in operation. That will happen. However, as described above, the operation timing of the paper feed roller 22 is such that the distance between the leading edge of a new document and the end of the document that has been scanned is determined by the rotation of the motor 7 during one cutter operation. Paper feed roller 2
2 and the document transport roller 1) are set so that the distance for transporting the document is as follows, so during the cutter operation,
The leading edge of a new document does not pass through the reading position, and copying can be performed without any trouble in reading.

Effects of the Invention As is clear from the above description, the present invention utilizes the drive motor for the document transport mechanism as a source of interlocking for the cutter mechanism, and the rotation direction of the drive motor is unidirectional. A clutch mechanism is not required for the conveyance means that conveys the document through the printer, reducing unevenness in document feeding.Furthermore, during continuous copying operations, an appropriate interval is left between the continuously fed documents. The cutter operation does not interfere with document reading, making it possible to make good copies.Furthermore, since the document transport mechanism and cutter mechanism can be operated simultaneously, full-duplex communication is possible in facsimile machines. This has the effect of making it possible to

[Brief explanation of drawings]

FIG. 1 is a perspective view schematically showing the drive system of a facsimile machine according to an embodiment of the present invention, FIG. FIG. 2 is a perspective view schematically showing a drive system of a facsimile machine. DESCRIPTION OF SYMBOLS 1... Document conveyance roller, 2... Reading unit, 4... Document, 7... Motor, 10... Recording paper, 11... Cutter mechanism, 11a... Cutter rotary blade, llb ...Cutter fixed blade, 12...Shaft, 13...Gear, 1
4...Spring clutch mechanism, 17...Claw, 19
... Solenoid, 21... Paper feeding unit, 22... Paper feeding roller, 24... Sensor, 27... Image pickup element. Name of agent: Patent attorney Toshi Nakao (male) 1 person Figure 2 2 Reading section 3 - pinterola +, rapid 2f...reigaku 1, ear numbness tlerola

Claims (1)

[Claims] a document conveyance mechanism including a paper feed means for taking out a read document placed in a paper feed section; a conveyance means for conveying the read document through the reading section; a cutter mechanism for cutting recording paper; the document conveyance mechanism; A motor for driving a cutter mechanism by rotation in one direction, a clutch mechanism for selectively transmitting the rotation of the motor to the cutter mechanism, and a clutch mechanism for selectively transmitting the rotation of the motor to the cutter mechanism. 1. A scanner printer characterized in that the scanner printer has means for providing a distance greater than the distance for the document transport mechanism to transport the document during the rotation of the motor for the cutter operation.